mirror of
https://github.com/troglobit/libite.git
synced 2026-10-01 05:22:34 +07:00
84 lines
2.1 KiB
C
84 lines
2.1 KiB
C
/* A conio.h like implementation for VTANSI displays.
|
|
*
|
|
* Copyright (c) 2009-2021 Joachim Wiberg <troglobit@gmail.com>
|
|
*
|
|
* Permission to use, copy, modify, and/or distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <poll.h>
|
|
#include <stdio.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
void initscr(int *row, int *col)
|
|
{
|
|
if (!row || !col)
|
|
return;
|
|
|
|
#if defined(TCSANOW) && defined(POLLIN)
|
|
struct termios tc, saved;
|
|
struct pollfd fd = { STDIN_FILENO, POLLIN, 0 };
|
|
|
|
if (!isatty(STDIN_FILENO) || !isatty(STDOUT_FILENO)) {
|
|
*row = 24;
|
|
*col = 80;
|
|
return;
|
|
}
|
|
|
|
/* Disable echo to terminal while probing */
|
|
tcgetattr(STDOUT_FILENO, &tc);
|
|
saved = tc;
|
|
tc.c_cflag |= (CLOCAL | CREAD);
|
|
tc.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
|
|
tcsetattr(STDOUT_FILENO, TCSANOW, &tc);
|
|
|
|
/*
|
|
* Save cursor pos+attr
|
|
* Diable top+bottom margins
|
|
* Set cursor at the far bottom,right pos
|
|
* Query term for resulting pos
|
|
*/
|
|
fprintf(stdout, "\e7" "\e[r" "\e[999;999H" "\e[6n");
|
|
fflush(stdout);
|
|
|
|
/*
|
|
* Wait here for terminal to echo back \e[row,lineR ...
|
|
*/
|
|
if (poll(&fd, 1, 300) <= 0 || scanf("\e[%d;%dR", row, col) != 2) {
|
|
*row = 24;
|
|
*col = 80;
|
|
}
|
|
|
|
/*
|
|
* Restore above saved cursor pos+attr
|
|
*/
|
|
fprintf(stdout, "\e8");
|
|
fflush(stdout);
|
|
|
|
/* Restore terminal */
|
|
tcsetattr(STDOUT_FILENO, TCSANOW, &saved);
|
|
|
|
return;
|
|
#else
|
|
*row = 24;
|
|
*col = 80;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* Local Variables:
|
|
* indent-tabs-mode: t
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|